From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Sat, 24 Mar 2007 14:16:24 +0000 (GMT) Received: from h155.mvista.com ([63.81.120.155]:14194 "EHLO imap.sh.mvista.com") by ftp.linux-mips.org with ESMTP id S20022711AbXCXOQW (ORCPT ); Sat, 24 Mar 2007 14:16:22 +0000 Received: from [192.168.1.248] (unknown [10.150.0.9]) by imap.sh.mvista.com (Postfix) with ESMTP id E26613ECA; Sat, 24 Mar 2007 07:15:47 -0700 (PDT) Message-ID: <460532BF.6080605@ru.mvista.com> Date: Sat, 24 Mar 2007 17:16:31 +0300 From: Sergei Shtylyov Organization: MontaVista Software Inc. User-Agent: Mozilla/5.0 (X11; U; Linux i686; rv:1.7.2) Gecko/20040803 X-Accept-Language: ru, en-us, en-gb MIME-Version: 1.0 To: Attila Kinali Cc: Marco Braga , linux-mips@linux-mips.org Subject: Re: Au1500 and TI PCI1510 cardbus References: <200703200204.l2K24WgH020041@centurysys.co.jp> <45FFEDED.6060708@ru.mvista.com> <45FFFE8B.1010806@ru.mvista.com> <4600052B.40901@ru.mvista.com> <46000ADD.3050309@ru.mvista.com> <20070324072308.c69557d0.attila@kinali.ch> In-Reply-To: <20070324072308.c69557d0.attila@kinali.ch> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 14658 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: sshtylyov@ru.mvista.com Precedence: bulk X-list: linux-mips Hello. Attila Kinali wrote: >>To sum it up, Cardbus bridge is not a viable solution on Au1500 for >>hotswapping devices, since any decent one (bus mastering) will not work. >>USB2.0 should instead work with PCI based controllers, that must be >>connected to the main PCI device (directly to Au1500). > We are using a board with a Au1550 with cardbus (PCI1520) and > USB2.0. The USB controller is directly connected to PCI. > Although cardbus isn't fully tested yet, USB seems to work fine > (atleast i haven't heard of any problems), but i don't know > from the top of my head which chip they used. > Also, the Au1550 doesn't seem to have the master-behind-bridge > bug as the 1500 does (at least according to the datasheet), Reading revisions C and D of the Au1550 datasheet, I see: 4.3.9 System Considerations The Au1550 PCI controller cannot be used with external PCI-to-PCI bridges that have PCI bus-mastering devices on the secondary bus which target the Au1550 memory. > so i guess cardbus should work also with "decent" cards :) OTOH, Au1550 errata I have is silent about the P2P bridges. > HTH > Attila Kinali WBR, Sergei